42143220 has 96 divisors (see below), whose sum is σ = 149856000. Its totient is φ = 9631872.

The previous prime is 42143219. The next prime is 42143249. The reversal of 42143220 is 2234124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 42143193 and 42143202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1795 + ... + 9354.

It is an arithmetic number, because the mean of its divisors is an integer number (1561000).

Almost surely, 2^42143220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42143220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74928000).

42143220 is an abundant number, since it is smaller than the sum of its proper divisors (107712780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42143220 is a wasteful number, since it uses less digits than its factorization.

42143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11174 (or 11166 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 42143220 is about 6491.7809574877. The cubic root of 42143220 is about 347.9973245930.

Adding to 42143220 its reverse (2234124), we get a palindrome (44377344).

The spelling of 42143220 in words is "forty-two million, one hundred forty-three thousand, two hundred twenty".